Together with TAP Architecture, Cardinal Engineering designed a new 836 space parking garage in the heart of downtown OKC. The structure is a $20 Million project and is 7 stories high. Construction began in early 2013 and was completed one year later. The garage is located immediately across Main Street from the City of Oklahoma City offices, and just south of City Hall. The site, adjacent to the historic Hightower Building, has been a surface parking lot for many years.